/**
 * Software License, Version 1.0
 *
 * Copyright 2003 The Trustees of Indiana University.  All rights reserved.
 *
 *
 *Redistribution and use in source and binary forms, with or without
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the
 * following acknowledgement:
 *
 *"This product includes software developed by the Community Grids Lab. For
 * further information contact the Community Grids Lab at
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgement may appear in the software itself, and
 * wherever such third-party acknowledgments normally appear.
 *
 *4) The name Indiana University or Community Grids Lab or NaradaBrokering,
 * shall not be used to endorse or promote products derived from this software
 * without prior written permission from Indiana University.  For written
 * permission, please contact the Advanced Research and Technology Institute
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called NaradaBrokering,
 * nor may Indiana University or Community Grids Lab or NaradaBrokering appear
 * in their name, without prior written permission of ARTI.
 *
 *
 * Indiana University provides no reassurances that the source code provided
 * does not infringe the patent or any other intellectual property rights of
 * any other entity.  Indiana University disclaims any liability to any
 * recipient for claims brought by any other entity based on infringement of
 * intellectual property rights or otherwise.
 *
 *LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO
 *WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 *NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF
 *INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS.
 *INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS",
 *"VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.
 *LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR
 *ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION
 *GENERATED USING SOFTWARE.
 */
package cgl.narada.service.reliable.events;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
/** The negotiation event issued by the reliable delivery service to ack
    (or nak) the reception (or lack of delivery) of a previously published
    event.

    @author Shrideep Pallickara and Hasan Bulut
    $Date$
    $Revision$
*/

public class RdNegotiationsServiceEvent {

  private boolean isAck = true;
  private boolean isStandaloneAck = false;
  private int ackCatenationNumber = 0;

  private int nakCatenationNumber = 0;
  private int templateId;
  private int entityId;
  private String moduleName = "RdNegotiationsServiceEvent: ";

  public RdNegotiationsServiceEvent(int entityId, int templateId,
				    boolean isAck, boolean isStandaloneAck, int catenationNumber) {
    this.entityId = entityId;
    this.templateId = templateId;
    this.isStandaloneAck = isStandaloneAck;
    this.isAck = isAck;
    if (isAck) {
      ackCatenationNumber = catenationNumber;
    } else {
      nakCatenationNumber = catenationNumber;
    }


  }

  /** Indicates  if this is an ACK */
  public boolean isAck() {
    return isAck;
  }

  public boolean isStandaloneAck() {
    return isStandaloneAck;
  }

  /** Retrieves the ack catenation number */
  public int getAckCatenationNumber() {
    return ackCatenationNumber;
  }

  /** Retrieves the Nak catenation number */
  public int getNakCatenationNumber() {
    return nakCatenationNumber;
  }


  public int getEntityId() {
    return entityId;
  }

  public int getTemplateId() {
    return templateId;
  }


  public RdNegotiationsServiceEvent(byte[] marshalledBytes) {
     ByteArrayInputStream baInputStream =
      new ByteArrayInputStream(marshalledBytes);
    DataInputStream din = new DataInputStream(baInputStream);

    try {
      din.readByte(); /**ReliableDeliveryExchange.RDS_ENTITY_NEGOTIATIONS */
      entityId = din.readInt();
      templateId = din.readInt();

      isAck = din.readBoolean();
      isStandaloneAck = din.readBoolean();
      if (isAck) {
	ackCatenationNumber = din.readInt();
      } else {
	nakCatenationNumber = din.readInt();
      }
    } catch (IOException ioe) {
      System.out.println(moduleName + "Error while un-marshalling");
    }

 }

  public byte[] getBytes() {
    ByteArrayOutputStream baOutputStream = new ByteArrayOutputStream();
    DataOutputStream dout = new DataOutputStream(baOutputStream);
    byte[] marshalledBytes= null;
    try {
      dout.writeByte(ReliableDeliveryExchange.RDS_ENTITY_NEGOTIATIONS);

      dout.writeInt(entityId);
      dout.writeInt(templateId);

      dout.writeBoolean(isAck);
      dout.writeBoolean(isStandaloneAck);
      if (isAck) {
	dout.writeInt(ackCatenationNumber);
      } else {
	dout.writeInt(nakCatenationNumber);
      }

      marshalledBytes = baOutputStream.toByteArray();
    } catch (IOException ioe) {
      System.out.println(moduleName + "Error while marshalling");
    } /** end try-catch block*/

    return marshalledBytes;
  }

}
